19.
Following other relations - creator Metadata for the object Controlled person name from a vocabulary at the Rijskmuseum

20.
Following other relations - match Information on Gustave Le Gray from the Rijskmuseum Vocabulary Matched to a &quot;Gustave Le Gray&quot; from another Vocabulary

21.
Following other relations – death place Information on Gustave Le Gray from the Union List of Artist Names (Getty)

22.
Following other relations – death place Information on Cairo from the Thesaurus of Geographic Names (Getty) Matched to &quot;Cairo&quot; from another vocabulary…

23.
<ul><li>A hell of relations? </li></ul><ul><li>Well, they were in the original data, we just had to make them explicit! </li></ul><ul><li>Cultural Heritage institution often have a wealth of metadata to share and exploit </li></ul>

33.
Where are the challenges? <ul><li>Semantic alignment (c'ed) </li></ul><ul><ul><li>Find correspondences between large vocabularies </li></ul></ul><ul><ul><li>In a multilingual context </li></ul></ul><ul><li>Scalability </li></ul><ul><ul><li>Plugging the semantic features into the Europeana production environment </li></ul></ul>

36.
EDM requirements & principles <ul><li>Distinction between “provided object” (painting, book, program) and digital representation </li></ul><ul><li>Distinction between object and metadata record describing an object </li></ul><ul><li>Allow for multiple records for same object, containing potentially contradictory statements about an object </li></ul><ul><li>Support for objects that are composed of other objects </li></ul><ul><li>Standard metadata format that can be specialized </li></ul><ul><li>Standard vocabulary format that can be specialized </li></ul><ul><li>EDM should be based on existing standards </li></ul>

37.
EDM basics <ul><li>OAI ORE for organization of metadata about an object </li></ul><ul><li>Dublin Core for metadata representation </li></ul><ul><li>SKOS for vocabulary representation </li></ul><ul><li>+ Links to CIDOC-CRM and other shared ontologies </li></ul>

38.
Dublin Core <ul><li>EDM uses the latest version of DCMI Metadata Terms for a core of semantically interoperable properties </li></ul><ul><ul><li>And for backward compatibility, cf. ESE </li></ul></ul><ul><li>Specified with an RDF model </li></ul><ul><li>Specialization of 15 original DC elements </li></ul><ul><li>Can be specialized itself </li></ul><ul><ul><li>see requirement -> this is a crucial distinction with ESE </li></ul></ul><ul><li>Used in the richest way possible </li></ul><ul><ul><li>Pointers to resources </li></ul></ul>

48.
A flexible model: different semantic grains <ul><li>Cf. goal: “preserve original data while still allowing for interoperability” </li></ul><ul><li>Keep data expressed as close as possible to original model </li></ul><ul><li>Using mappings to more interoperable level </li></ul>

49.
A flexible model: objects, events and the rest <ul><li>Preserving and exploiting original data also means being compatible with descriptions beyond simple object level </li></ul><ul><li>Also crucial for semantic enrichment </li></ul>

50.
A flexible model: object and events (2) <ul><li>Classes and Properties for event-, agent-, place-centric modeling </li></ul><ul><li>Instances of (local) vocabularies using skos:Concept </li></ul><ul><li>Using RDF, EDM allows any kind of network to be attached to a provided object. </li></ul>

54.
The case for linked data in cultural heritage <ul><li>Not just a more sophisticated way to represent data! </li></ul><ul><li>Ease of getting data from external sources </li></ul><ul><ul><li>Just going to the URI and fetch the RDF there </li></ul></ul><ul><li>Ease of publishing data </li></ul><ul><ul><li>Linked data as a dissemination channel for Europeana data </li></ul></ul><ul><li>Ease of linking across datasets </li></ul><ul><ul><li>Linked data as a dissemination channel for Europeana data </li></ul></ul><ul><li>Object identification as cornerstone </li></ul><ul><ul><li>Records are just a side feature! </li></ul></ul>

60.
<ul><li>A broad range of datasets </li></ul><ul><li>That describe the same objects </li></ul><ul><li>Or related objects </li></ul><ul><li>Which are about similar subjects </li></ul><ul><li>Which were made by the same persons </li></ul><ul><li>Or related persons </li></ul><ul><li>In the same places </li></ul><ul><li>Etc… </li></ul>